RS64-IV

[Marcin]

Who knows FSB for RS64-IV 600 Mhz CPU or 668 MHz version ? Can't find in google

[doccybrown]

Hi Marcin,
I think it could be the value printed
on the oscillator I`ve marked!
Sometimes the oscillator feeds a
clock-chip which generates a
different clockspeed.
I am not sure if 'FSB' in this case
is the right name for it since it
was an invention by Intel.
I could imagine the bus is running
at full core clockspeed.
/Doccy

[ItsMeOnly]

Hehehe, you know that's his board now?

[el_gecko]

[pinkie]

I think the dual core one is the RS CPU as many cache around it.

[Marcin]

[ItsMeOnly]

[el_gecko]

Anyone would like to trade one ?

[Marcin]

On oscillator I found information : 62.500 so ?

[doccybrown]

Are you sure it is not a 750MHz board?
750 / 12 = 62.5

[Marcin]

[doccybrown]

Heureka!
Found this:

Memory Controller
A single custom chip provides the function of the memory controller
and the I/O hub in the Model 6F1. The controller chip provides
interfaces to processors, memory, and the I/O subsystem.

The RS64 IV processors on the processor boards are connected
to the memory controller through the PowerPC 6xx bus.
The controller chip is a part of the first processor board.
The memory controller provides a single 6xx bus interface in a
single processor configuration. For 2-way SMP configurations,
the controller provides a 6xx bus interface to the pair of RS64 IV
processors present in the same board. The memory controller
provides another 6xx bus interface for CPU expansion using an
additional processor board. The 4- and 6-way SMP configurations
consists of a total of two processor boards that use the two 6xx
bus interfaces provided by the memory controller installed
together in a book.

In the Model 6F1, the 6xx bus is a 16-byte wide bus, the operating
clock rate of which depends on the processor clock speed.
The 6xx bus operates at a clock rate of 150 MHz when the processor
clock speed is 600 MHz. For a processor clock speed of 668 MHz,
the 6xx bus operates at a clock rate of 133.6 MHz.

Source:
www.ibm.com/jp/servers/eserver/pseries/hardware/whitepaper/70256f1.pdf

[Marcin]

BINGO !! Thanks Andree